哈希与加密
生成哈希值，编码/解码数据，并创建安全密码。
哈希与加密 — About These Tools
Hash functions compress any input into a fixed-length fingerprint; encoders like Base64 and URL encoding make binary data safe to transport. Use these tools to verify downloads, generate checksums, create secrets, and encode data — computed locally, nothing uploaded.
常见问题
Which hash should I use?
SHA-256 for anything security-related today. MD5 and SHA-1 are fine for checksums but broken for signatures — do not use them where collision resistance matters.
Is hashing the same as encryption?
No. Hashing is one-way — you cannot recover the input. Encryption is two-way with a key. Encoding like Base64 is not encryption at all and is trivially reversible.
Why do identical files sometimes produce different hashes?
They should not — identical bytes always produce an identical hash with the same algorithm. If hashes differ, the files differ somewhere, even if they look the same.